code: def get_example(self, i):
      img = np.random.randint(0, 256, size=(3, 48, 64))
      if self.empty_bbox:
          n_bbox = 0
      else:
          n_bbox = np.random.randint(10, 20)
      bbox = generate_random_bbox(n_bbox, (48, 64), 5, 20)
      label = np.random.randint(0, 20, size=n_bbox).astype(np.int32)
  
      return (img, bbox, label) + self.options
  
imports: import numpy
  import unittest
  from chainer.dataset import DatasetMixin
  from chainercv.utils import assert_is_bbox_dataset
  from chainercv.utils import generate_random_bbox
  from chainercv.utils import testing
label_desc: Use image node_id 3 for calling the BboxDataset obj's underlying member method code with example usage: obj.get_example(i) and returns: unknown